GUI:
    [*] tempo map
    [ ] settings panel (currently only jack related settings)
    [*] show last action name for undo / redo
    [N] dyndrawer <<< FIX_VOCAL_DYNAMICS -- currently hidden

Synth:
    [*] new Sinsy backend (using my fork of espeak-ng)
    [*] test the new shm_ringbuffer (working correctly, last samples need to be flushed in depends)
    [*] new WorldBased concatenative synth (UTAULOID only for now)
    

Session.cpp:
    [*] midi support to extenal class
    [*] MusicXML export support (via Sinsy)
    [ ] NSM support

Exporters/Importers:
    [*] UST importer using ini parser
    [ ] VSQ/VSQX importer

bugfixes:
    [*] madde no sound in formant window
    [*] audio engine crash on shutdown
    [*] scheduler refactoring (audio)
    
release:  
    [*] cleanup
    [*] guix build
